Balanced rotary valve



(No Model.)

2 Sheets-Sheet 1,

H. 0* BEER.

BALANCED ROTARY VALVE.

Patented Sept. 16, 1 884.

l l l UNITED STATES PATENT OFFICE,

HANS C. BEHR, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE-HALF TO W.I. SALKELD, OF SAME PLACE.

BALANCED ROTARY VA LVE.

SPECIFICATION forming part of Letters Patent. No. 305,132, datedSeptember 16, 1884.

Application filed January 17, 1884.

-To all whom it may concern the following to be a full, clear, and exactdescription thereof.

My invention relates to certain improvements in that class of valveswhich fit a concave cylindrical seat and vibrate or oscillate abouttheir longitudinal axes, so as to open and close the steam-ports in thevalve-face.

It consists of a two-part valve the opposite faces of which fit oppositesidesof the cylindrical seat and control ports, through which steam mayact equally upon both faces to balance the valve. This valve issupported in a rectangular opening in the trunnion-bar, by which it isoscillated, and a wedge-piece is fitted into the same opening,and ismovable longitudinally between the two parts of the v alve, having amechanism for moving it, so as to adjust the two parts of the valve toor from the valve-seats, and relieving-springs, all of 2 flwhich will bemore fully explained by reference to the accompanying drawings,in whichFigure 1 is a vertical section of the valve and adj usting-wedge,takentransversely to the axis of the valve. Fig. 2 is a section through thevalve-chamber in a plane cutting the axis longitudinally, showing theValve, adjustingwedge, and. springs. Fig. 3 is a top view of thetrunnion-bar, showing the wedge and half of the valve within it.

In the present case the valve C is shown in two parts, held together bya wedge-piece, c. The valve and the wedge-piece are fitted into theopening through the trunnion-bar G, by which the valve is caused tooscillate upon its axis. The valve-chamber has a shallow port, K, formedin the side opposite to the port A, and connect-ed with it by passages LL, so that the pressure of the steam will be equal in both ports.

The valve, as before stated, is made in two parts, one of which coversthe port A and the other the balance-port K, so that the pressure I uponboth valve-faces will be equal under all (No model.)

conditions. The two halves of the valve are formed with projections g 9,extending the full length of the valve, and these engage with similarprojections, f f, upon the wedge-piece c. The bearing-faces M of theprojections are inclined to the axis a: y of the valve, so that the twohalves of the valve will approach to or reoede from each other when thewedgepieee e is moved in the direction parallel with the axis. To keepthe surfaces 1' of the projections f and g in contaot,the springs F Fareinserted in the spaces S S between the halves of the valve and thewedge-piece c. The adjustment of the wedge-piece c is effected by therod h, which passes through a hole longitudinally in one ,of thetrunnion-bars, and is held in position by the set-screw t A spring, j,holds the two halves of the valve C against one end of the slot in thetrunnion-bar G. This valve remains balanced as long as the valvefaccsare kept from actual or frictional contact with the valve-seats. Therewill also be no pressure upon the trunnions on account of the twoopposite equal valve-faces acted upon by steam-pressure.

Having thus described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is-

l. Acylindrical valve-chamber with steamports upon opposite sides, incombination with a longitudinally-divided valve having a centralwedge-piece fitting within the trunnion-bar, and projections whichengage corresponding projections uponthe two parts of the valve, andmeans, substantially as described, for moving said wedge-piecelongitudinally to adjust the parts of the valve, substantially asspecified.

2. A cylindrical valve chamber having ports 011 opposite sidescommunicating by passages L, in combination with a longitudinallydividedvalve havinga central wedge-shaped piecefitting within thehltllllllOll-bdl,&l1d1)l'0- jections which engage correspondingprojections upon the two parts of the valve, means, substantially asdescribed, for adjusting said part-s, and an end spring, substantiallyas set forth.

3. A cylindrical valve chamber having ports on opposite sides, ashallowlongitudinal port, and annular ports L, in combination with alongitudinally-divided valve having a central wedge-shaped piececonstructed and arranged as shown, with means for adjusting it, asdescribed, and all substantially as and for the purpose specified.

4:- A two-part valve having an adjusting IO wedgerpiece fitted within anopen trunnionbar,with means for adjusting said wedge-piece, and lateralsprings on both sides thereof, and anend spring, all arranged as and forthe purpose set forth.

5. A cylindrically-shaped valve-chamber having steam-ports diametricallyopposite to each other, avalve divided longitudinally and fitting aslotted trunnion-bar, by which it is driven, a wedge-shaped piece withinthe trun- 2o nion-bar, between the two parts of the valve,

and having lugs or projections which engage similar projections upon thetwo parts of the valve, and a mechanism, substantially as described, bywhich the wedge-shaped piece may be moved longitudinally between the twoparts of the valve, in combination with springs F between thewedge-piece and the valve-sections,whereby they are allowed to move fromtheir seats, substantially as herein described.

6. A two part valve with an adjusting wedge-piece fitted within an opentrunnionbar, with means for adjusting,and interposed springs, as shown,in combination with the end spring, 9', substantially as hereindescribed.

' 7. A valve fitting a concave cylindrical valve-seat and the oppositeside of the valvechamber, composed of two parts with angularlongitudinal projections which engage similar projections upon a centralwedge-piece in the trunnion-bar, by which the valve is oscillated uponits seat, and a mechanism, substantially as described, by which thevalve is adjusted to or from its seats by the longitudinal movement ofthe wedge-shaped piece on itself, substantially as herein described.

In witness whereof I have hereunto set my hand.

HAXS G. BEHR.

